Live Weather & Forecast
Weather in Williamstown
South Australia, Australia · Real-time conditions & 3-day outlook
17°C
Feels like 17°C
63°F / Feels 63°F
Clear
Williamstown, South Australia
🌙 Nighttime
Updated: 2026-04-25 21:15
Humidity
41%
Wind
5 km/h SE
Wind Gust
10.6 km/h
Pressure
1020 mb
Visibility
10 km
UV Index
0
(Low)
Precipitation
0 mm
Cloud Cover
17%
Dew Point
4°C
Wind Degree
133°
Air Quality Index
US EPA: Good
UK DEFRA: Low (1)
CO
86.9 μg/m³
NO₂
2.1 μg/m³
O₃
76 μg/m³
SO₂
1.8 μg/m³
PM 2.5
1.4 μg/m³
PM 10
2.2 μg/m³
Today's Hourly Forecast
24-hour breakdown for Williamstown, South Australia
12 AM
17°
Clear
1 AM
18°
Clear
2 AM
19°
Cloudy
3 AM
19°
Clear
4 AM
19°
Overcast
5 AM
19°
Clear
6 AM
19°
Clear
7 AM
19°
Sunny
8 AM
21°
Sunny
9 AM
23°
Sunny
10 AM
25°
Sunny
11 AM
26°
Sunny
12 PM
26°
Partly Cloudy
1 PM
26°
Partly Cloudy
2 PM
26°
Sunny
3 PM
25°
Partly Cloudy
4 PM
23°
Partly Cloudy
5 PM
21°
Partly Cloudy
6 PM
20°
Clear
7 PM
20°
Clear
8 PM
18°
Clear
9 PM
17°
Clear
10 PM
18°
Cloudy
11 PM
18°
Partly Cloudy
3-Day Forecast
Daily overview for Williamstown, South Australia
Today
Sunny
26°
/
17°
🌧️ 0% chance of rain
💧 Avg. humidity: 32%
💨 Max wind: 19.1 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 4.8
🌅 Sunrise: 06:46 AM
🌇 Sunset: 05:40 PM
🌙 Waxing Gibbous
🌑 Moon: 60% lit
Sun, Apr 26
Patchy rain nearby
21°
/
14°
🌧️ 74% chance of rain
💧 Avg. humidity: 66%
💨 Max wind: 9.4 km/h
🌧️ Total precip: 0.55 mm
☀️ UV Index: 4.5
🌅 Sunrise: 06:47 AM
🌇 Sunset: 05:39 PM
🌙 Waxing Gibbous
🌑 Moon: 70% lit
Mon, Apr 27
Sunny
25°
/
13°
🌧️ 0% chance of rain
💧 Avg. humidity: 58%
💨 Max wind: 10.4 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 4.8
🌅 Sunrise: 06:48 AM
🌇 Sunset: 05:38 PM
🌙 Waxing Gibbous
🌑 Moon: 79% lit
Best Time to Visit Williamstown
Plan your trip to Williamstown, Australia around the most favorable weather conditions.
Peak Season
December – March
Southern hemisphere summer — warm and generally dry.
Shoulder Season
April – May, November
Fewer crowds, moderate prices, mild weather.
Off Season
June – September
Cooler winter months; indoor activities preferred.
Frequently Asked Questions
What is the current weather in Williamstown?
Current conditions in Williamstown: Clear, temperature 17°C, humidity 41%.
What is the best time to visit Williamstown?
The best time to visit Williamstown is typically December – March. Southern hemisphere summer — warm and generally dry.
What is the climate like in Williamstown?
Williamstown is located at approximately -34.7° latitude. It experiences a temperate southern hemisphere climate.
Does it rain a lot in Williamstown?
The wettest period in Williamstown is typically during June – September. Cooler winter months; indoor activities preferred.
What should I pack for a trip to Williamstown?
For visits to Williamstown during December – March: light clothing and sun protection. For June – September: layers and a waterproof jacket are recommended.
What country is Williamstown in?
Williamstown is located in Australia, in the state of South Australia.
What are the public holidays in Williamstown in 2026?
View the 2026 public holidays for Williamstown on our Holidays page.
What are the GPS coordinates used for the weather forecast in Williamstown?
The weather forecast for Williamstown uses coordinates -34.6717, 138.8905.
What is the current temperature outside in Williamstown?
The current outdoor temperature in Williamstown is 17°C (63°F) with clear.
What is the hourly weather forecast for Williamstown today?
Today's hour-by-hour weather breakdown for Williamstown is shown in the Hourly Forecast section above, including temperature, rain chance, and conditions for each hour of the day.
What is the weather in Williamstown tomorrow hour by hour?
Tomorrow's forecast for Williamstown shows a high of 21°C and a low of 14°C. See the 3-Day Forecast section above for a full hourly breakdown.
What is the chance of rain today in Williamstown?
Rain is not expected in Williamstown today. Current forecast shows no significant rain probability.
Is it going to rain today in Williamstown?
No, rain is not forecast for Williamstown today. Current conditions show clear to partly cloudy skies.